Hi
I've worked on the vaccum system of the 1.4s quite a bit... but from memory I cant be sure where the pipe from the re-circulation valve goes to on the engine......( not too much help am I?? sorry! )
I have a idea....from memory
T piece on top of rocker cover...
one hose goes to the base of the carburretor....
other one goes to the air filter but there is a restriction in the hose.... if the original hose is still there the restriction is built in... if it has been replaced the hose with be a normal hollow hose but there will be a cut in it somewhere and a small black ( later models it was red ) plastic insert which acts as the restriction....
on some models this restriction has a extra pipe coming off it which goes to the recirculation system
if the system fails to work at all.. the valve might have gone... its is a large cylinder about 3 inches long located near the heater box under the bonnet..... has two thin pipes going to it.....
If only I had a 340 here to look at!!! ( mine is at home.... )
what seems to be the problem? Isnt it working at all??
one clue is when you release the re-circulation ( ie switch it off ) after it has been running a while, you should hear a small hissing from the air vent as the pressure equalises...
keep us posted with what you find and ask again if you need more help!!
Shimon
